Valve for gas or gasolene engines.



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AVALVE FOB GAS 0R GASOLENE E NGNES.

(Application led Oct. 4, 1900.)

(No Model.)

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UNITED STATES PATENT OFFICE.

ALANSON P. BRUSH, OF DETROIT, MICHIGAN.

VALVE FOR GAS OR GASOLENE ENGINES.

SPECIFICATION forming part of Letters Patent No. 710,840, dated October 7, 1902.

Application filed October 4, 1900. Serial No. 31,991. (No model.)

To @ZZ whom, 71mg/ concern:

Be it known that I, ALANsoN P. BRUSH, a citizen of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new anduseful Improvement in Valves for Gas or Gasolene Engines; and I declare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention rhas for its object an automatic proportioning inlet-valve for gas and gasolene engines; and it consists of the construction, combination, and arrangement of devices hereinafter described and claimed, and illustrated-in the accompanying drawings, in which-'- Figure l is a view, partly in elevation and partly in vertical section, illustrating features of my invention attached 'to the cylinder of a gas or gasolene engine, the section being on the .line 3 3, Fig. 2. Fig. 2 is a view in cross-section on the line 2 2, Fig. l. Fig. 3 is an enlarged view, in vertical section, through the valve and valve-case on the line 3 3, Fig. 2. Fig. 4 is a detail view in perspective of the valve and valve-stem.

The valve is of a vacuum-opening type.

A cylinder of a gas or gasolene engine is indicated at a, and b denotes the piston-head, and c its piston-rod. These parts may beef any desired construction. The cylinder is formed with a port CZ, with which the valvecase e communicates. The interior of the valve-case e is formed with two chambers s and f, the case being constructed at the base of said chambers with a valve-seat, as at g, upon which seats my improved Valve proper, (indicated at 7L,) the valve opening as shown. The valve-stem i' is provided at the upper ends of the chambers s and f with a disk or diaphragm y', the stem projecting through the cap k of the valve-case. Extending from the valve 7L to the disk or diaphragm jis a wing Z. An additional wing is indicated at m, held in place at its outer edge by a separable portion of the valve-case, (indicated at 01,) to which the portion e of the valve-case is united, as by bolts p. The wing m is independent of l the valve-stem 'Z and of the valve h and diaphragmj, so that the valve-stem and the wing- Z can be rotated to bring the wing Z nearer to the wing m or farther away therefrom, as may be desired, to vary the proportions of free air and of gas or saturated air. This operation of rotating the valve-stem with the wing Z may be accomplished readily while the engine is in operation, if desired, the wings Z and 'm being the proportioning-wiugs of the valve.

An admission-port for gas or saturated air is indicated at (1, and r is an admission-port for free air. The admission-port for gas or saturated air opens into the chamber s between the proportioning-wings,while the port r opens into the chambervf outside said wings. will always be greater than the areas of their respective openings into the cylinder when the valve is unseated, and the ratio of the dischargesY therefrom into the cylinder is regulated, as already observed, by regulating the arcs of the chambers s and f. It will be evident that when the valve is u'nseated both the chambers f andsA will open through the port d into the cylinder. When the wings Z and 'm are relatively adjusted, the proportions of gas or saturated air and free air are constant, while the mechanism may easily be adjusted whenever desired for varying the proportions.

The speed of the engine is controlled by means of an adjustable stop (indicated at t) The areas of the'chambers s and f y;

through which the valve-stem i may project,

the stop being adjustable in any suitable manner. As shown, the stop is engaged at one end in a recess u of the valve-case, an adjusting-screw o being provided having a threaded engagement with a collar w upon the stop t. In thisA manner the stop may be moved nearer to the case e or away therefrom, as circumstances may require. The valve-stem is provided with a cap (indicated at no) to strike against the stop to limit the movement of the valve 7L when unseated. A retracting-spring y returns the valve to its seat. By means of the stop t the valve 7L may be allowed to open more or less, as may be desired. It will be seen that the adjustment of the valve by means of the stop t may be effected without varying the proportions of IOO - tion.

the mixture admitted into the cylinder. The stop Z may be adjusted in any desired manner and might be attached to a governing device, if preferred.

The wings Z and m are obviously in the nature of diaphragms, forming the chamber s therebetween, the arc of opening from said chamber into the cylinder being variable by the adjustment of one of said wings or-diaphragms.

It will be evident that in the operation of the valve the chambers 3 and f when the valve is unseated discharge independently into the cylinder through the port CZ. The lengths ot the openings into the cylinder of the engine from the chambers s and f when the valve is unseated are equal to the lengths of the arcs of said chambers determined by the position of the two wings. By the adjustment of one of the wings, as hereinbefore described, the ratio of the areas of the two openings into the cylinder' from the chambers s and f when the valve is unseated may be varied as desired, thus controlling the proportions of gas or saturated air to free air admitted to the cylinder. It will be observed that the ratio of the two areas-. e., the areas of the openings into the cylinder from the chamberssandfis at all times proportionate to the corresponding arcs.

To determine the area of the opening from each chamber into the cylinder when the valve is unseated, it will be evident that the arc of the chamber in cross-section is one dimension of the opening and that the distance the valve is allowed to unseat is the other dimension, the product of the two dimensions being the area of the corresponding opening. It will be evident that the distance the valve is allowed to unseat will be the same in regard to each opening, and therefore this di' mension may be eliminated from considera- Since this is true, the areas of the two openings will always be in proportion to their corresponding arcs,as hereinbefore indicated. It will be understood that the wing or diaphragm m is longitudinally movable with the seating and unseating of the valve. The valve-stem, with the valve Zz, the diaphragm j, and the intervening wing Z, may be rotated in any desired manner. As shown, the cap 7tis providedwith a pin Z, engaging the diaphragm j, so that by turning said cap the diaphragm, with the wing Z and valve h, will be rotated accordingly. With the cap la, for example, may engage a lever o.

While I have described the valve as of the vacuum-openingtype, I do not, however, coniine myselt` solely thcreto,as my invention contemplates the employment of the valve in any manner to which it may be found adaptedas, for example, where the valve is opened mechanically in the operation of the engine.

It will be observed that the invention consists, broadly, of a valve seated in a suitable case, said valve and case forming when the valve is unseated two independent chambers or passages discharging independently through the valve and case, the openings of said passages or chambers formed by the unseating of the valve being constructed at or made adjustable to a desired ratio of areas the one to the other, said ratio being constant regardless of `the total area of the discharge-openings, which capacity may be governed by regulating the distance the valve may unseat.

What I claim as my invention isl. A vacuum-opening valve having in combination a valve-case formed with an interior passage, air and gas inlets to said passage, a partition or diaphragm between said inlets lengthwise of .the passage, a rotatable valve seating at the base of the case, a second partition circularly movable with the valve'within the case, whereby said passage is divided into air and gas chambers of relatively variable size.

2. The combination with a valve-case, of a valve seated in said case, wings or diaphragms forming a gas-chamber therebetween within4 said valve-case, a gas-port opening into said gas-chamber, and an air-port opening into the interior of the Valve-case outside said chamber, one of said wings or diaphragms being adjustable nearer to or farther from the other wing or diaphragm.

3. The combination with a Valve-case, of a valve seated in said case, a rotatable valvestem connected with said valve, wings or diaphragms forming a gas-chamber therebetween within said valve-case, a port opening into said gas-chamber, and an air-port opening into the interior of the valve-case outside said chamber, one of said wings or diaphragms rotatable with the valve-stem.

i. The combination with a valve-case, of a valve seated in said case, a rotatable valvestem connected with said valve, wings or diaphragms forming al chamber between said wings within said valve-case, a port opening into said chamber, and a port opening into the interior of the valve-case outside said chamber, one of said wings or diaphragms rotatable with the valve-stem, the other of said wings or diaphragms held in position between said ports. e,

5. The combination with a valve-case, of a valve seated in said case, a rotatable valvestem connected with said valve, a wing or diaphragm carried by said valve-stem, an additional wing or diaphragm longitudinally movable with said valve-stem forming a cham- IIO ber between said wings, a port opening into or diaphragms, a port openinginto said charnber, and a port opening into the interior of the valve-ease outside said chamber.

7. The combination with a valvecasing having separate air and gas inlets, of avalve controlling the outlet, and partitions forming,r Chambers in the casing and connected tothe valve to be moved thereby in its seating and nnseating, one of said partitions being movable with relation to the other to vary the relative sizes of the chambers.

8. A valve-casing having separate air and gas inlets, a partition in the casing between said inlets and dividing it into two chambers, a valve controlling the outlet, and a second partition carried by the valve and rotatably movable to vary the relative sizes ofthe chambers.

A valve-Casing having separate air and gas inlets, a partition in the easing between said inlets and dividingit into two chambers, a valve controlling the outlet, and a second partition rotatably movable to vary the relative sizes of the chambers.

l0. The combination ofa valve-oasing,sepa

rate inlets for air and gas, a suction-valve controlling the outlet, and means carried by the valve for proportioning the quantities of air and gas.

ll. The combination of the valve-Casing, separate inlets for air and gas, asuetion-valve oontrolling the outlet, and means movable with the valve for proportioning the quantities of air and gas, said means being adjustable.

12. The Combination ofavalveeasing,sepa rate passages for air and gas, a reoiproeatory suction-valve controlling the outlet of said passages, and means carried by the valve for proportioning the quantities of air and gas, said valve being rotatably adjustable for controlling the proportions of air and gas regardless of the amount of the opening of the valve.

In testimony whereof I sign this specification in the presence oi' two Witnesses.

ALANSON P. BRUSH.

Witnesses:

N. S. WRIGHT, M. HICKEY. 

